Method of adding secondary cell group, terminal device, and master node

ABSTRACT

A method of adding a secondary cell group, a terminal device, and a main node are provided. The method of adding a secondary cell group includes: receiving conditional-addition SCG information sent by a master node; evaluating, according to the conditional-addition SCG information, whether one or more target cells in an SCG meet a condition corresponding to triggering addition of a target cell, and obtaining a result of the evaluation; triggering, according to the result of the evaluation, a process of adding a SCG target cell.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No.16/975,093, which is a U.S. national phase application of PCTApplication No. PCT/CN2019/074571 filed on Feb. 2, 2019, which claims apriority to Chinese Patent Application No. 201810157672.1 filed in Chinaon Feb. 24, 2018, the disclosures of which are incorporated in theirentirety by reference herein.

TECHNICAL FIELD

The present disclosure relates to the field of communicationstechnology, in particular relates to a method of adding a secondary cellgroup, a terminal device, and a master node.

BACKGROUND

In a fifth-generation (5 Generation, 5G) mobile communications system,terminal device such as a user equipment (User Equipment, UE) can adopta dual connectivity (Dual Connectivity, DC) architecture including twocell groups which are respectively a master cell group (Master CellGroup, MCG) and a secondary cell group (Secondary Cell Group, SCG), theMCG corresponds to a master node (Master Node, MN) at a network side,and the SCG corresponds to a secondary node (secondary node, SN) at thenetwork side. Specifically, the MCG includes a primary cell (PrimaryCell, PCell) and a secondary cell (Secondary Cell, SCell), the SCGincludes a primary secondary cell (Primary Secondary Cell, PSCell) and aSCell, and the PCell and PSCell can be collectively referred to as aspecial Cell (Special Cell, SpCell).

Currently, a main process of a conditional handover of the UE is asfollows. An original node sends handover request information to one ormore target nodes; the target nodes feed back handover confirmationinformation to the original node; the original node sends configurationinformation of the condition handover to the UE; the UE evaluateswhether a candidate cell meets a handover condition, and if the handovercondition is met, the UE selects a target cell for handover; the UEinitiates a random access procedure in the selected target cell; the UEsends handover completion information to the target node; the originalnode sends a conditional-handover cancellation command to other targetnodes; the other target nodes send the conditional-handover cancellationconfirmation command to the original node.

Under the DC architecture, communications systems often need to bedeployed with a large number of small cells and small base stations. Inthis condition, if a condition-based SCG addition process in related artis adopted, a large number of configuration signaling operations arerequired, which will cause a signaling loss, and it may be impossible toadd SCG cells immediately and effectively, and it is impossible toquickly achieve load-balancing between a primary cell group and asecondary cell group, and utilization efficiency of air-interfaceresources is reduced.

SUMMARY

The embodiments of the present disclosure provide a method of adding asecondary cell group, a terminal device, and a master node, so as tosolve a problem that a large number of configuration signalingoperations are required by the method of the condition-based SCGaddition method in the related art, a signaling loss is caused, and itis impossible to add SCG cells immediately and effectively.

In a first aspect, the embodiments of the present disclosure provide amethod of adding a secondary cell group, the method is applied to aterminal device, the method includes: receiving conditional-addition SCGinformation sent by a master node; evaluating, according to theconditional-addition SCG information, whether one or more target cellsin an SCG meet a condition corresponding to triggering addition of atarget cell, and obtaining a result of the evaluation; triggering,according to the result of the evaluation, a process of adding a SCGtarget cell.

In the second aspect, the embodiments of the present disclosure alsoprovide a method of adding a secondary cell group, the method is appliedto a master node, the method includes sending conditional-addition SCGinformation to a terminal device; wherein the conditional-addition SCGinformation is used by the terminal device for evaluating, according tothe conditional-addition SCG information, whether one or more targetcells in an SCG meet a condition corresponding to triggering addition ofa target cell, and obtaining a result of the evaluation, and triggering,according to the result of the evaluation, a process of adding a SCGtarget cell.

In a third aspect, the embodiments of the present disclosure alsoprovide a terminal device. The terminal device includes: a firstreceiving module, used for receiving conditional-addition SCGinformation sent by a master node; an evaluating module, used forevaluating, according to the conditional-addition SCG information,whether one or more target cells in an SCG meet a conditioncorresponding to triggering addition of a target cell, and obtaining aresult of the evaluation; a triggering module, used for triggering,according to the result of the evaluation, a process of adding a SCGtarget cell.

In a fourth aspect, the embodiments of the present disclosure alsoprovide a master node. The master node includes a third sending module,used for sending conditional-addition SCG information to a terminaldevice, wherein the conditional-addition SCG information is used by theterminal device for evaluating, according to the conditional-additionSCG information, whether one or more target cells in an SCG meet acondition corresponding to triggering addition of a target cell, andobtaining a result of the evaluation, and triggering, according to theresult of the evaluation, a process of adding a SCG target cell.

In a fifth aspect, the embodiments of the present disclosure alsoprovide a terminal device. The terminal device includes a storage, aprocessor, and a computer program stored on the storage and executableby the processor, wherein, when the computer program is executed by theprocessor, the processor implements steps of the method of adding asecondary cell group applied to the terminal device.

In a sixth aspect, the embodiments of the present disclosure alsoprovide a master node. The master node includes a storage, a processor,and a computer program stored on the storage and executable by theprocessor, wherein, when the computer program is executed by theprocessor, the processor implements steps of the method of adding asecondary cell group applied to the master node.

In a seventh aspect, the embodiments of the present disclosure alsoprovide a computer readable storage medium having a computer programstored thereon, wherein when the computer program is executed by aprocessor, the processor implements steps of the method of adding asecondary cell group applied to the terminal device or the master node.

In the embodiments of the present disclosure, the conditional-additionSCG information sent by the master node is received, and whether one ormore target cells in the SCG meet a condition corresponding totriggering addition of a target cell is evaluated according to theconditional-addition SCG information, and a result of the evaluation isobtained; and a process of adding a SCG target cell is triggeredaccording to the result of the evaluation. This enables the terminaldevice to add a target cell in the SCG immediately and effectively whena network configuration condition is met, thereby reducing a loss ofair-interface signaling and achieving fast load-balancing betweenprimary and secondary cell groups, and improving utilization efficiencyof air-interface resources.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain technical solutions of the embodiments of thepresent disclosure more clearly, drawings to be used in the embodimentsof the present disclosure will be briefly introduced below. Obviously,the drawings in the following description are only some embodiments ofthe present disclosure. Other drawings can be obtained by those ofordinary skill in the art from these drawings without paying creativework.

FIG. 1 is a flowchart of a method of adding a secondary cell groupaccording to an embodiment of the present disclosure;

FIG. 2 is another flowchart of a method of adding a secondary cell groupaccording to an embodiment of the present disclosure;

FIG. 3 is a flowchart of a process of adding a secondary cell group in aspecific example of the present disclosure;

FIG. 4 is a first schematic structural diagram of a terminal deviceaccording to an embodiment of the present disclosure;

FIG. 5 is a first schematic structural diagram of a master nodeaccording to an embodiment of the present disclosure;

FIG. 6 is a second schematic structural diagram of a terminal deviceaccording to an embodiment of the present disclosure;

FIG. 7 is a second schematic structural diagram of a master nodeaccording to an embodiment of the present disclosure.

DETAILED DESCRIPTION

Hereinafter, exemplary embodiments of the present disclosure will bedescribed in more detail with reference to accompanying drawings.Although the drawings show exemplary embodiments of the presentdisclosure, it should be understood that the present disclosure can beimplemented in various forms and should not be limited by theembodiments set forth herein. On the contrary, these embodiments areprovided to enable a more thorough understanding of the presentdisclosure and to fully convey the protection scope of the presentdisclosure to those skilled in the art.

As shown in FIG. 1 , an embodiment of the present disclosure provides amethod of adding a secondary cell group. The method is applied to aterminal device, and includes the following steps 101-103.

Step 101: receiving conditional-addition SCG information sent by amaster node.

Step 102: evaluating, according to the conditional-addition SCGinformation, whether one or more target cells in an SCG meet a conditioncorresponding to triggering addition of a target cell, and obtaining aresult of the evaluation.

Step 103: triggering a process of adding a SCG target cell according tothe result of the evaluation.

In the method of adding a secondary cell group in the embodiment of thepresent disclosure, the conditional-addition SCG information sent by themaster node is received, and whether one or more target cells in the SCGmeet a condition corresponding to triggering addition of a target cellis evaluated according to the conditional-addition SCG information, anda result of the evaluation is obtained; and a process of adding a targetcell in the SCG is triggered according to the result of the evaluation.This enables the terminal device to add a target cell in the SCGimmediately and effectively when a network configuration condition ismet, thereby reducing a loss of air-interface signaling and achievingfast load-balancing between primary and secondary cell groups, andimproving utilization efficiency of air-interface resources.

In the embodiment of the present disclosure, the conditional-additionSCG information may include one or more of the following: identificationinformation of one or more target cells conditionally added;configuration information of one or more target cells conditionallyadded; one or more conditions corresponding to triggering the additionof a target cell; identification information of one or more conditionscorresponding to triggering the addition of a target cell; effectivetime of one or more conditions corresponding to triggering the additionof a target cell.

It should be pointed out that identification information of a conditioncorresponding to triggering deletion of a target cell is specificallyidentification information of a corresponding condition corresponding totriggering deletion of the target cell.

Further, the condition corresponding to triggering the addition of thetarget cell includes one or more of the following: a measurement resultof the target cell reaching or exceeding a preset threshold; ameasurement result of a serving cell (such as an MCG cell) reaching orfalling below a preset threshold; difference between the measurementresult of the target cell and the measurement result of the serving cell(such as the MCG cell) reaching or exceeding a preset threshold; themeasurement result of the target cell reaching or exceeding a firstpreset threshold, and the measurement result of the serving cell (suchas the MCG cell) reaching or falling below a second preset threshold.

It should be understood that the foregoing preset threshold, the firstpreset threshold, and the second preset threshold are preset accordingto actual conditions, which are not limited in the embodiments of thepresent disclosure.

Further, the aforementioned measurement results may include one or moreof the following: a reference symbol received power (Reference SymbolReceived Power, RSRP), a reference signal received quality (ReferenceSignal Received Quality, RSRQ) and a signal interference noise ratio(Signal Interference Noise Ration, SINR).

In the embodiment of the present disclosure, when the terminal devicetriggers the process of adding a target cell in the SCG, the terminaldevice may perform at least one of the following steps: when theconditional-addition SCG information includes the configurationinformation of one or more target cells conditionally added, performingconfiguration according to configuration information of a SCG targetcell that meets the condition corresponding to triggering the additionof the target cell; performing downlink synchronization with the SCGtarget cell that meets the condition corresponding to triggering theaddition of the target cell; initiating a random access procedure in theSCG target cell that meets the condition corresponding to triggering theaddition of the target cell.

Further, after triggering the process of adding the SCG target cell, theterminal device may also perform at least one of the following steps:stopping evaluating whether one or more target cells in the SCG meet thecondition corresponding to triggering the addition of target cells;deleting one or more conditions corresponding to triggering the additionof the target cell; deleting unconfigured (that is, unapplied, unadded)configuration information of one or more target cells conditionallyadded.

In the embodiment of the present disclosure, if a network sideconfigures the effective time of the condition corresponding totriggering the addition of the target cell, that is, theconditional-addition SCG information sent by the network node includesone or more conditions corresponding to triggering the addition of thetarget cell and the effective time of the one or more conditions. Theabove step 102 may include: for each condition corresponding totriggering the addition of the target cell, starting a timer, wherein aduration of the timer is the effective time corresponding to eachcondition corresponding to triggering the addition of the target cell;before the timer expires, evaluating whether a corresponding target cellmeets the condition corresponding to triggering the addition of thetarget cell, and obtaining the result of the evaluation; that is, afterthe timer expires, the terminal device no longer evaluates and judgesthe corresponding target cell.

Further, in a case of starting at least one timer, the terminal devicemay also perform at least one of the following steps: when theconditional-addition SCG information includes identification informationof one or more conditions corresponding to triggering the addition ofthe target cell, and one or more timers (including all timers) of the atleast one timer expires, deleting identification information,corresponding to an expired timer, of a condition corresponding totriggering addition of the target cell; when the conditional-additionSCG information includes configuration information of one or more targetcells conditionally added, and one or more timers (including all timers)of the at least one timer expires, deleting configuration information,corresponding to an expired timer, of the target cell conditionallyadded.

In the embodiment of the present disclosure, after receiving theconditional-addition SCG information sent by the master node, theterminal device may also send configuration confirmation information tothe master node. The configuration confirmation information is used bythe master node to determine corresponding conditional-addition SCGconfirmation information. Contents included in the confirmationinformation of the corresponding conditional-addition SCG informationmay be the same as content included in the configuration confirmationinformation.

Optionally, the configuration confirmation information includes one ormore of the following: information of rejecting a SCG conditionallyadded; information of agreeing a SCG conditionally added.

Optionally, the information of rejecting the SCG conditionally addedincludes one or more of the following: identification information of oneor more rejected target cells conditionally added; one or more rejectedconditions corresponding to triggering the addition of the target cell;identification information of one or more rejected conditionscorresponding to triggering the addition of the target cell.

Optionally, the information of agreeing the SCG conditionally addedincludes one or more of the following: identification information of oneor more agreed target cells conditionally added; configurationinformation of one or more agreed target cells conditionally added; oneor more agreed conditions corresponding to triggering the addition ofthe target cell; identification information of one or more agreedconditions corresponding to triggering the addition of the target cell.

In the embodiment of the present disclosure, after obtaining the resultof the evaluation, the terminal device may also send a notificationmessage to the master node. The notification message is used to notifythe master node of related information of the SCG added by the terminaldevice.

Optionally, the related information of the SCG added by the terminaldevice includes one or more of the following: identification informationof one or more target cells conditionally added; identificationinformation of one or more met conditions corresponding to triggeringthe addition of the target cell; configuration information of one ormore target cells added under a met condition.

As shown in FIG. 2 , an embodiment of the present disclosure alsoprovides a method of adding a secondary cell group. The method isapplied to a master node, and includes the following step 201.

Step 201: sending conditional-addition SCG information to a terminaldevice; wherein the conditional-addition SCG information is used by theterminal device for evaluating, according to the conditional-additionSCG information, whether one or more target cells in an SCG meet acondition corresponding to triggering addition of a target cell, andobtaining a result of the evaluation, and triggering a process of addinga SCG target cell according to the result of the evaluation.

In the method of adding a secondary cell group in the embodiment of thepresent disclosure, the conditional-addition SCG information is sent toa terminal device. The terminal device is enabled to evaluate, accordingto the conditional-addition SCG information, whether one or more targetcells in the SCG meet a condition corresponding to triggering additionof a target cell, and obtain a result of the evaluation; and trigger aprocess of adding a SCG target cell according to the result of theevaluation. This enables an operation of adding a target cell in the SCGimmediately and effectively when a network configuration condition ismet, thereby reducing a loss of air-interface signaling and achievingfast load-balancing between primary and secondary cell groups, andimproving utilization efficiency of air-interface resources.

In the embodiment of the present disclosure, before step 201, the methodfurther includes: sending conditional-addition SCG request informationto one or more secondary nodes; receiving conditional-addition SCGfeedback information sent by the one or more secondary nodes; whereinthe conditional-addition SCG feedback information is used by the masternode to determine corresponding conditional-addition SCG information.

Optionally, the conditional-addition SCG request information includesone or more of the following: identification information of one or moretarget cells conditionally added; one or more conditions correspondingto triggering the addition of a target cell; identification informationof one or more conditions corresponding to triggering the addition of atarget cell; effective time of one or more conditions corresponding totriggering the addition of a target cell.

Optionally, the condition corresponding to triggering the addition ofthe target cell includes one or more of the following: a measurementresult of the target cell reaching or exceeding a preset threshold; ameasurement result of a serving cell (such as an MCG cell) reaching orfalling below a preset threshold; difference between the measurementresult of the target cell and the measurement result of the serving cellreaching or exceeding a preset threshold; the measurement result of thetarget cell reaching or exceeding a first preset threshold, and themeasurement result of the serving cell reaching or falling below asecond preset threshold.

Optionally, the measurement result includes one or more of thefollowing: the RSRP, the RSRQ and the SINR.

Optionally, the conditional-addition SCG feedback information includesone or more of the following: information of rejecting a SCGconditionally added; information of agreeing a SCG conditionally added.

Optionally, the information of rejecting the SCG conditionally addedincludes one or more of the following: identification information of oneor more rejected target cells conditionally added; one or more rejectedconditions corresponding to triggering the addition of the target cell;identification information of one or more rejected conditionscorresponding to triggering the addition of the target cell.

Optionally, the information of agreeing the SCG conditionally addedincludes one or more of the following: identification information of oneor more agreed target cells conditionally added; configurationinformation of one or more agreed target cells conditionally added; oneor more agreed conditions corresponding to triggering the addition ofthe target cell; effective time of one or more agreed conditionscorresponding to triggering the addition of the target cell.

In the embodiment of the present disclosure, after step 201, the methodfurther includes: receiving configuration confirmation information sentby the terminal device; sending conditional-addition SCG confirmationinformation to the one or more secondary nodes.

In the embodiment of the present disclosure, after receiving theconditional-addition SCG feedback information sent by one or moresecondary nodes, the method further includes: receivingconditional-addition SCG indication information sent by a targetsecondary node; wherein the conditional-addition SCG indicationinformation is sent by the target secondary node after the targetsecondary node detects that the terminal device accesses the targetcell.

Optionally, the conditional-addition SCG indication information includesone or more of the following: identification information of the terminaldevice; identification information of one or more target cellsconditionally added; identification information of one or moreconditions corresponding to triggering the addition of the target cell;configuration information of one or more target cells added under a metcondition; identification information of the target secondary node.

In the embodiment of the present disclosure, after receiving theconditional-addition SCG feedback information sent by one or moresecondary nodes, the method further includes: sending, to othersecondary nodes, related information of cancelling aconditional-addition SCG; wherein the related information of cancellinga conditional-addition SCG is used for the other secondary nodes tocancel a resource reserved for the corresponding conditional-additionSCG, the other secondary nodes are secondary nodes other than the targetsecondary node among the one or more secondary nodes.

Further, after sending, to the other secondary nodes, the relatedinformation of canceling the conditional-addition SCG, the methodfurther includes: receiving confirmation information sent by the othersecondary nodes; wherein the confirmation information is used by themaster node to confirm that the corresponding conditional-addition SCGhas been cancelled.

In an embodiment of the present disclosure, after receiving theconditional-addition SCG feedback information sent by one or moresecondary nodes, the method further includes: receiving relatedinformation, sent by other secondary nodes, of cancelling aconditional-addition SCG; confirming, according to the relatedinformation of cancelling the conditional-addition SCG, that thecorresponding conditional-addition SCG is cancelled; wherein the othersecondary nodes are secondary nodes other than the target secondary nodeamong the one or more secondary nodes.

Optionally, the related information of cancelling theconditional-addition SCG includes one or more of the following:identification information of one or more cancelled target cellsconditionally added; identification information of one or more cancelledconditions corresponding to triggering the addition of the target cell;configuration information of one or more cancelled target cellsconditionally added; identification information of the terminal device.

In the embodiment of the present disclosure, after step 201, the methodfurther includes: sending updated configuration information to theterminal device; wherein the updated configuration information is usedfor the terminal device to cancel the related information of thecorresponding conditional-addition SCG.

Optionally, the updated configuration information includes one or moreof the following: identification information of one or more cancelledtarget cells conditionally added; identification information of one ormore cancelled conditions corresponding to triggering the addition ofthe target cell; configuration information of one or more cancelledtarget cells conditionally added.

A condition-based process of adding a secondary cell group in a specificexample of the present disclosure will be described with reference toFIG. 3 hereinafter.

In an embodiment of the present disclosure, two secondary nodes SN1 andSN2 are taken as an example (but the present disclosure is not limitedthereto, there may be a plurality of secondary nodes in other examples,such as three or five secondary nodes), wherein SN1 is the targetsecondary node, SN2 is the other secondary node. Referring to FIG. 3 ,the processing of adding a secondary cell group may include thefollowing steps 301-313.

Step 301: sending conditional-addition SCG request information to theSN1 and the SN2 by the MN, wherein contents included inconditional-addition SCG request information can be the contentscontained in the above conditional-addition SCG request information.

Step 302: feeding, by the SN1 and the SN2 to the MN,conditional-addition SCG feedback information, respectively, wherein thecontent included in the conditional-addition SCG feedback informationcan be the content contained in the above-mentioned conditional-additionSCG feedback information.

Step 303: sending conditional-addition SCG information (this informationmay be sent by means of an RRC connection reconfiguration message, thatis, air-interface configuration information) to a UE by the MN, whereinthe content included in the conditional-addition SCG information can bethe content contained in the above-mentioned conditional-addition SCGinformation.

Step 304: feeding back configuration confirmation information (thisinformation can be fed back by means of the RRC connectionreconfiguration completion message) to the MN by the UE, wherein thecontents included in the configuration confirmation message can be thecontents contained in the above configuration confirmation message.

Step 305: sending, according to the received configuration confirmationinformation, conditional-addition SCG confirmation information (thisinformation can be transmitted by means of RRC connectionreconfiguration complete message) to the SN1 and the SN2 by the MN;wherein the content included in the conditional-addition SCGconfirmation information may be the same as the content contained in theconfiguration confirmation information.

Step 306: evaluating and judging, by the UE according to the receivedconditional-addition SCG information, whether one or more target cellsin the SCG meet a condition corresponding to triggering addition of atarget cell, and obtaining the result of the evaluation.

Step 307: triggering, by the UE according to the obtained result of theevaluation, a process of adding the SCG target cell.

The process may be one or more of the following: performingconfiguration according to configuration information of a SCG targetcell meeting the condition corresponding to triggering the addition ofthe target cell; performing downlink synchronization with the SCG targetcell that meets the condition corresponding to triggering the additionof the target cell; initiating a random access procedure in the SCGtarget cell that meets the condition corresponding to triggering theaddition of the target cell.

Additionally, the UE may also perform at least one of the followingactions: stopping evaluating whether one or more target cells in the SCGmeet the condition corresponding to triggering the addition of targetcells; deleting one or more conditions corresponding to triggering theaddition of the target cell; deleting unconfigured configurationinformation of one or more target cells conditionally added

Step 308: after obtaining the result of the evaluation, sending anotification message to the MN by the UE, wherein the notificationmessage is used for notifying the MN of the related information of theconditionally added SCG met by the UE, and the content included in therelated information of the added SCG can be the content contained in therelated information of the above-mentioned added SCG.

Step 309: after the SN1 detects that the UE accesses the target cell,sending, by SN1 to the MN, conditional-addition SCG indicationinformation, wherein the content included in the conditional-additionSCG indication information can be the content in the aboveconditional-addition SCG indication information.

Step 310: sending, by the MN to the SN2, related information ofcancelling a conditional-addition SCG, wherein the content included inthe related information of cancelling the conditional-addition SCG canbe the content contained in the above related information of cancellingthe conditional-addition SCG.

Step 311: cancelling, by the UE according to the received relatedinformation of cancelling the conditional-addition SCG, a resourcereserved for a corresponding conditional-addition SCG, and sendingconfirmation information to the MN, wherein the confirmation informationis used for the MN to confirm that the correspondingconditional-addition SCG has been canceled.

Here, step 310 and step 311 may be initiated at any time after step 302.

Step 312: sending, by the SN2 to the MN, the related information ofcancelling the conditional-addition SCG, wherein the content included inthe related information of cancelling the conditional-addition SCG canbe the content contained in the above related information of cancellingthe conditional-addition SCG.

Step 313: confirming, by the MN according to the received relatedinformation of cancelling the conditional-addition SCG, cancellation ofthe corresponding conditional-addition SCG, and sending confirmationinformation to the SN2.

Here, step 312 and step 313 may be initiated at any time after step 302.

Additionally, the MN may send updated configuration information to theUE (this process may employ a message type consistent with that in step303), so that the UE cancels related information of the correspondingconditional-addition SCG, and the contents included in the updatedconfiguration information can be the contents contained in theabove-mentioned updated configuration information.

The above-described embodiments describe the method of adding asecondary cell group of the present disclosure, and the terminal deviceand the master node of the present disclosure will be described belowwith reference to the embodiments and the drawings.

Referring to FIG. 4 , an embodiment of the present disclosure furtherprovides a terminal device. The terminal device includes: a firstreceiving module 41, an evaluating module 42, and a triggering module43.

The first receiving module 41 is used for receiving conditional-additionSCG information sent by a master node. The evaluating module 42 is usedfor evaluating, according to the conditional-addition SCG information,whether one or more target cells in an SCG meet a conditioncorresponding to triggering addition of a target cell, and obtaining aresult of the evaluation. The triggering module 43 is used fortriggering a process of adding a SCG target cell according to the resultof the evaluation.

The terminal device receives the conditional-addition SCG informationsent by the master node, evaluates, according to theconditional-addition SCG information, whether one or more target cellsin the SCG meet a condition corresponding to triggering addition of atarget cell, and obtains a result of the evaluation, and triggers,according to the result of the evaluation, a process of adding a targetcell in the SCG. This enables the terminal device to add a target cellin the SCG immediately and effectively when a network configurationcondition is met, thereby reducing a loss of air-interface signaling andachieving fast load-balancing between primary and secondary cell groups,and improving utilization efficiency of air-interface resources.

Optionally, the conditional-addition SCG information may include one ormore of the following: identification information of one or more targetcells conditionally added; configuration information of one or moretarget cells conditionally added; one or more conditions correspondingto triggering the addition of a target cell; identification informationof one or more conditions corresponding to triggering the addition of atarget cell; effective time of one or more conditions corresponding totriggering the addition of a target cell.

Optionally, the condition corresponding to triggering the addition ofthe target cell includes one or more of the following: a measurementresult of the target cell reaching or exceeding a preset threshold; ameasurement result of a serving cell reaching or falling below a presetthreshold; difference between the measurement result of the target celland the measurement result of the serving cell reaching or exceeding apreset threshold; the measurement result of the target cell reaching orexceeding a first preset threshold, and the measurement result of theserving cell reaching or falling below a second preset threshold.

Optionally, the aforementioned measurement results include one or moreof the following: a reference symbol received power (RSRP), a referencesignal received quality (RSRQ) and a signal interference noise ratio(SINR).

Optionally, the trigger module 43 is specifically used to perform one ormore of the following: when the conditional-addition SCG informationincludes the configuration information of one or more target cellsconditionally added, performing configuration according to configurationinformation of a SCG target cell that meets the condition correspondingto triggering the addition of the target cell; performing downlinksynchronization with the SCG target cell that meets the conditioncorresponding to triggering the addition of the target cell; initiatinga random access procedure in the SCG target cell that meets thecondition corresponding to triggering the addition of the target cell.

Optionally, the conditional-addition SCG information includes one ormore conditions corresponding to triggering the addition of the targetcell and the effective time of the one or more conditions, and theevaluating module 42 is specifically used for: for each conditioncorresponding to triggering the addition of the target cell, starting atimer, wherein a duration of the timer is the effective time of eachcondition corresponding to triggering the addition of the target cell;before the timer expires, evaluating whether a corresponding target cellmeets the condition corresponding to triggering the addition of thetarget cell, and obtaining the result of the evaluation.

In the embodiment of the present disclosure, the terminal device mayfurther include a deleting module. The deleting module is used for, in acase of starting at least one timer, when the conditional-addition SCGinformation includes identification information of one or moreconditions corresponding to triggering the addition of the target cell,and one or more timers of the at least one timer expires, deletingidentification information, corresponding to an expired timer, of acondition corresponding to triggering addition of the target cell;and/or, in a case of starting at least one timer, when theconditional-addition SCG information includes configuration informationof one or more target cells conditionally added, and one or more timersof the at least one timer expires, deleting configuration information,corresponding to an expired timer, of the target cell conditionallyadded.

In the embodiment of the present disclosure, the terminal device furtherincludes a first sending module, used for sending configurationconfirmation information to the master node, wherein the configurationconfirmation information is used by the master node to determinecorresponding conditional-addition SCG confirmation information.

Optionally, the configuration confirmation information includes one ormore of the following: information of rejecting a SCG conditionallyadded; information of agreeing a SCG conditionally added.

Optionally, the information of rejecting the SCG conditionally addedincludes one or more of the following: identification information of oneor more rejected target cells conditionally added; one or more rejectedconditions corresponding to triggering the addition of the target cell;identification information of one or more rejected conditionscorresponding to triggering the addition of the target cell.

Optionally, the information of agreeing the SCG conditionally addedincludes one or more of the following: identification information of oneor more agreed target cells conditionally added; configurationinformation of one or more agreed target cells conditionally added; oneor more agreed conditions corresponding to triggering the addition ofthe target cell; identification information of one or more agreedconditions corresponding to triggering the addition of the target cell.

In an embodiment of the present disclosure, the terminal device furtherincludes a second sending module used for sending a notification messageto the master node, wherein the notification message is used to notifythe master node of related information of the SCG added by the terminaldevice.

Optionally, the related information of the SCG added by the terminaldevice includes one or more of the following: identification informationof one or more target cells conditionally added; identificationinformation of one or more met conditions corresponding to triggeringthe addition of the target cell; configuration information of one ormore target cells added under a met condition.

Optionally, the terminal device further includes a processing moduleused for performing at least one of following: stopping evaluatingwhether one or more target cells in the SCG meet the conditioncorresponding to triggering the addition of a target cell; deleting oneor more conditions corresponding to triggering the addition of thetarget cell; deleting unconfigured configuration information of one ormore target cells conditionally added

As shown in FIG. 5 , an embodiment of the present disclosure furtherprovides a master node. The master node includes a third sending module51 used for sending conditional-addition SCG information to a terminaldevice; wherein the conditional-addition SCG information is used by theterminal device for evaluating, according to the conditional-additionSCG information, whether one or more target cells in an SCG meet acondition corresponding to triggering addition of a target cell, andobtaining a result of the evaluation, and triggering, according to theresult of the evaluation, a process of adding a target cell in the SCG.

The master node in the embodiment of the present disclosure sends theconditional-addition SCG information to a terminal device, so that theterminal device is enabled to evaluate, according to theconditional-addition SCG information, whether one or more target cellsin the SCG meet a condition corresponding to triggering addition of atarget cell, and obtain a result of the evaluation; and trigger,according to the result of the evaluation, a process of adding a targetcell in the SCG. This enables an operation of adding a target cell inthe SCG immediately and effectively when a network configurationcondition is met, thereby reducing a loss of air-interface signaling andachieving fast load-balancing between primary and secondary cell groups,and improving utilization efficiency of air-interface resources.

Optionally, the primary node further includes a first transceivingmodule used for sending conditional-addition SCG request information toone or more secondary nodes; receiving conditional-addition SCG feedbackinformation sent by the one or more secondary nodes; wherein theconditional-addition SCG feedback information is used by the master nodeto determine corresponding conditional-addition SCG information.

Optionally, the conditional-addition SCG request information includesone or more of the following: identification information of one or moretarget cells conditionally added; one or more conditions correspondingto triggering the addition of a target cell; identification informationof one or more conditions corresponding to triggering the addition of atarget cell; effective time of one or more conditions corresponding totriggering the addition of a target cell.

Optionally, the condition corresponding to triggering the addition ofthe target cell includes one or more of the following: a measurementresult of the target cell reaching or exceeding a preset threshold; ameasurement result of a serving cell reaching or falling below a presetthreshold; difference between the measurement result of the target celland the measurement result of the serving cell reaching or exceeding apreset threshold; the measurement result of the target cell reaching orexceeding a first preset threshold, and the measurement result of theserving cell reaching or falling below a second preset threshold.

Optionally, the measurement result includes one or more of thefollowing: the RSRP, the RSRQ and the SINR.

Optionally, the conditional-addition SCG feedback information includesone or more of the following: information of rejecting a SCGconditionally added; information of agreeing a SCG conditionally added.

Optionally, the information of rejecting the SCG conditionally addedincludes one or more of the following: identification information of oneor more rejected target cells conditionally added; one or more rejectedconditions corresponding to triggering the addition of the target cell;identification information of one or more rejected conditionscorresponding to triggering the addition of the target cell.

Optionally, the information of agreeing the SCG conditionally addedincludes one or more of the following: identification information of oneor more agreed target cells conditionally added; configurationinformation of one or more agreed target cells conditionally added; oneor more agreed conditions corresponding to triggering the addition ofthe target cell; effective time of one or more agreed conditionscorresponding to triggering the addition of the target cell.

Optionally, the master node further includes a second transceivingmodule used for receiving configuration confirmation information sent bythe terminal device; and sending conditional-addition SCG confirmationinformation to the one or more secondary nodes.

Optionally, the master node further includes a second receiving moduleused for receiving conditional-addition SCG indication information sentby a target secondary node; wherein the conditional-addition SCGindication information is sent by the target secondary node after thetarget secondary node detects that the terminal device accesses thetarget cell.

Optionally, the conditional-addition SCG indication information includesone or more of the following: identification information of the terminaldevice; identification information of one or more target cellsconditionally added; identification information of one or moreconditions corresponding to triggering the addition of the target cell;configuration information of one or more target cells added under a metcondition; identification information of the target secondary node.

Optionally, the master node further includes a fourth sending moduleused for sending, to other secondary nodes, related information ofcancelling a conditional-addition SCG; wherein the related informationof cancelling a conditional-addition SCG is used for the other secondarynodes to cancel a resource reserved for the correspondingconditional-addition SCG, the other secondary nodes are secondary nodesother than the target secondary node among the one or more secondarynodes.

Further, the master node further includes a third receiving module usedfor receiving confirmation information sent by the other secondarynodes; wherein the confirmation information is used by the master nodeto confirm that the corresponding conditional-addition SCG has beencancelled.

Optionally, the master node further includes a fourth receiving moduleused for receiving related information, sent by other secondary nodes,of cancelling a conditional-addition SCG; a confirming module used forconfirming, according to the related information of cancelling theconditional-addition SCG, that the corresponding conditional-additionSCG is cancelled; wherein the other secondary nodes are secondary nodesother than the target secondary node among the one or more secondarynodes.

Optionally, the related information of cancelling theconditional-addition SCG includes one or more of the following:identification information of one or more cancelled target cellsconditionally added; identification information of one or more cancelledconditions corresponding to triggering the addition of the target cell;configuration information of one or more cancelled target cellsconditionally added; identification information of the terminal device.

Optionally, the master node further includes a fifth sending module usedfor sending updated configuration information to the terminal device;wherein the updated configuration information is used for the terminaldevice to cancel the related information of the correspondingconditional-addition SCG.

Optionally, the updated configuration information includes one or moreof the following: identification information of one or more cancelledtarget cells conditionally added; identification information of one ormore cancelled conditions corresponding to triggering the addition ofthe target cell; configuration information of one or more cancelledtarget cells conditionally added.

An embodiment of the present disclosure also provides a terminal deviceincluding a processor, a storage, a computer program stored on thestorage and executable by the processor, wherein, when the computerprogram is executed by the processor, the processor implements eachprocess of various embodiments of the above method of adding a secondarycell group applied to the terminal device, and the same technical effectcan be achieved, and is not repeated herein.

In particular, FIG. 6 is a schematic diagram of a hardware structure ofa terminal device implementing various embodiments of that presentdisclosure, The terminal device 600 includes, but is not limited to, aradio frequency unit 601, a network module 602, an audio output unit603, an input unit 6014, a sensor 605, a display unit 606, a user inputunit 607, an interface unit 608, a storage 609, a processor 610, and apower supply 611, and other components. Those skilled in the art willappreciate that a structure of the terminal shown in FIG. 6 does notconstitute a limitation of a terminal. The terminal device may includemore or fewer components than illustrated, or combine certaincomponents, or different component arrangements. In some embodiments ofthe present disclosure, the terminal includes, but is not limited to, amobile phone, a tablet computer, a notebook computer, a palmtopcomputer, an in-vehicle terminal, a wearable device, a pedometer, andthe like.

The radio frequency unit 601 is used for receiving conditional-additionSCG information sent by a master node. The processor 610 is used forevaluating, according to the conditional-addition SCG information,whether one or more target cells in an SCG meet a conditioncorresponding to triggering addition of a target cell, and obtaining aresult of the evaluation; and triggering, according to the result of theevaluation, a process of adding a target cell in the SCG.

The terminal device 600 of the embodiment of the present disclosurereceives the conditional-addition SCG information sent by the masternode, evaluates, according to the conditional-addition SCG information,whether one or more target cells in the SCG meet a conditioncorresponding to triggering addition of a target cell, and obtains aresult of the evaluation, and triggers, according to the result of theevaluation, a process of adding a target cell in the SCG. This enablesthe terminal device to add a target cell in the SCG immediately andeffectively when a network configuration condition is met, therebyreducing a loss of air-interface signaling and achieving fastload-balancing between primary and secondary cell groups, and improvingutilization efficiency of air-interface resources.

It should be understood that, in the embodiment of the presentdisclosure, the radio frequency unit 601 is used for receiving andtransmitting signals in processes of transmitting and receivinginformation or talking. Specifically, after the radio frequency unit 601receives downlink data from a base station, and the downlink data istransferred by the radio frequency unit 601 to the processor 610 forprocessing; and additionally the radio frequency unit 601 sends uplinkdata to the base station. Generally, the radio frequency unit 601includes, but is not limited to, an antenna, at least one amplifier, atransceiver, a coupler, a low noise amplifier, a duplexer, and the like.In addition, the radio frequency unit 601 may also communicate with anetwork and other devices through a wireless communication system.

The terminal device provides a wireless broadband internet access to auser through the network module 602, such as helping the user to sendand receive emails, browse web pages, access streaming media, and thelike.

The audio output unit 603 may convert audio data received by the radiofrequency unit 601 or the network module 602 or stored in the storage609 into an audio signal and output the audio signal as sound. The audiooutput unit 603 may also provide audio output (e.g., a call signalreception sound, a message reception sound, etc.) related to a specificfunction performed by the terminal device 600. The audio output unit 603includes a speaker, a buzzer, a receiver, and the like.

The input unit 604 is used to receive an audio or video signal. Theinput unit 604 may include a Graphics Processing Unit (GPU) 6041 and amicrophone 6042. The graphics processing unit 6041 processes image dataof a still picture or a video obtained by an image capturing device suchas a camera in a video capturing mode or an image capturing mode. Theprocessed image frame may be displayed on the display unit 606. Imageframes processed by the graphics processing unit 6041 may be stored inthe storage 609 (or other storage media) or sent via the radio frequencyunit 601 or the network module 602. The microphone 6042 may receivesound and be able to process such sound into audio data. The processedaudio data may be converted, in a case of a telephone communicationmode, into a format output that may be sent to a mobile communicationbase station via the radio frequency unit 601.

The terminal device 600 also includes at least one sensor 605, such as alight sensor, a motion sensor, and other sensors. In particular, thelight sensor includes an ambient light sensor and a proximity sensor,wherein the ambient light sensor may adjust brightness of the displaypanel 6061 according to brightness of ambient light. The proximitysensor may turn off the display panel 6061 and/or a backlight when theterminal device 600 moves close to the ear. As one type of motionsensor, the accelerometer sensor can detect a value of an accelerationin each direction (generally the three axes directions), and can detecta magnitude and a direction of gravity when being stationary, can beused to recognize a posture of a terminal (such as horizontal-verticalscreen switching, a related game, a magnetometer posture calibration), avibration-recognition related function (such as a pedometer, tapping),and the like. The sensor 605 may further include a fingerprint sensor, apressure sensor, an iris sensor, a molecular sensor, a gyroscope, abarometer, a hygrometer, a thermometer, an infrared sensor, and thelike, which will not be described herein.

The display unit 606 is used to display information inputted by the useror information provided to the user. The display unit 606 may include adisplay panel 6061 that may be configured in the form of a LiquidCrystal Display (LCD), an Organic Light-Emitting Diode (OLED), or thelike.

The user input unit 607 may be used to receive inputted digital orcharacter information and generate a key signal input related touser-setting and function control of a terminal. Specifically, the userinput unit 607 includes a touch panel 6071 and other input devices 6072.The touch panel 6071, also referred to as a touch screen, may collect atouch operation (e.g., an operation of a user using any suitable objector accessory, such as a finger, stylus, or the like, on or near thetouch panel 6071) of the user on or near the touch panel 6071. The touchpanel 6071 may include two parts, i.e., a touch detection device and atouch controller. The touch detection device detects a touch orientationof the user, detects a signal brought about by a touch operation,transmits the signal to the touch controller, and the touch controllerreceives touch information from the touch detection device, converts thetouch information into contact coordinates and sends the contactcoordinates to the processor 610, and receives and executes commandsfrom the processor 610. In addition, the touch panel 6071 may beimplemented in various types such as a resistance type, a capacitancetype, an infrared ray, and a surface acoustic wave. The user input unit607 may also include other input devices 6072 in addition to the touchpanel 6071. Specifically, the other input devices 6072 may include, butare not limited to, a physical keyboard, function keys (such as volumecontrol keys, switch keys, etc.), a trackball, a mouse, and a joystick,which will not be described herein.

Further, the touch panel 6071 may be overlaid on the display panel 6061,and after the touch panel 6071 detects a touch operation on or near thetouch panel 6071, the touch operation is sent by touch panel 6071 to theprocessor 610 to determine the type of a touch event. The processor 610then provides a corresponding visual output on the display panel 6061according to the type of the touch event. Although in FIG. 6 , the touchpanel 6071 and the display panel 6061 are two separate components forimplementing input and output functions of the terminal, the input andoutput functions of the terminal in some embodiments may be realized byintegrating the touch panel 6071 with the display panel 6061, and thepresent disclosure is not limited thereto.

The interface unit 608 is an interface in which an external device isconnected to the terminal device 600. For example, the external devicemay include a wired or wireless headset port, an external power supply(or a battery charger) port, a wired or wireless data port, a memorycard port, a port for connecting a device having an identificationmodule, an audio input/output (I/O) port, a video I/O port, a headphoneport, and so on. The interface unit 608 may be used to receive input(e.g., data information, power, etc.) from an external device andtransmit the received input to one or more elements within the terminaldevice 600 or may be used to transmit data between the terminal device600 and the external device.

The storage 609 may be used to store software programs and various typesof data. The storage 609 may mainly include a storage program area and astorage data area, wherein, the storage program area may store anoperating system, an application program required by at least onefunction (such as a sound playing function, an image playing function,etc.), and the like; the storage data area may store data (such as audiodata, a phonebook, etc.) created according to a use condition of themobile phone. In addition, the storage 609 may include a high speedrandom access memory, and may also include a non-transitory memory, suchas at least one disk storage device, a flash memory device, or othervolatile solid state storage device.

The processor 610 is a console of the terminal device, connects variousparts of the entirety of the terminal using various interfaces andlines, and executes various functions and processes data of the terminalby running or executing software programs and/or modules stored in thestorage 609, and by calling data stored in the storage 609, therebyintegrally monitoring the terminal. The processor 610 may include one ormore processing units; optionally, the processor 610 may integrate anapplication processor and a modem processor, wherein the applicationprocessor primarily processes an operating system, a user interface, anapplication program, etc. The modem processor mainly handles wirelesscommunication. It will be appreciated that the above-described modemprocessor may also not be integrated into the processor 610.

The terminal device 600 may also include a power supply 611 (such as abattery) that supplies power to various components, optionally, thepower supply 611 may be logically connected to the processor 610 via apower management system. Thus, functions such as charging, discharging,and power consumption management are managed by the power managementsystem.

In addition, the terminal 600 includes some functional modules notshown, which will not be described here.

An embodiment of the present disclosure also provides a master nodeincluding a processor, a storage, and a computer program stored on thestorage and executable by the processor, wherein, when the computerprogram is executed by the processor, the processor implements eachprocess of the method embodiments of the above method of adding asecondary cell group applied to a master node, and the same technicaleffect can be achieved, and in order to avoid repetition, thedescription thereof is not repeated here.

In particular, FIG. 7 is a schematic diagram of a hardware structure ofa master node implementing various embodiment of that presentdisclosure. The master node 70 includes, but is not limited to, a bus71, a transceiver 72, an antenna 73, a bus interface 74, a processor 75,and a storage 76.

In the embodiment of the present disclosure, the master node 70 furtherincludes a computer program stored on the storage 76 and executable bythe processor 75, wherein when the computer program is executed byprocessor 75, the processor 75 implements the follow steps: sendingconditional-addition SCG information to a terminal device; wherein theconditional-addition SCG information is used by the terminal device forevaluating, according to the conditional-addition SCG information,whether one or more target cells in an SCG meet a conditioncorresponding to triggering addition of a target cell, and obtaining aresult of the evaluation, and triggering, according to the result of theevaluation, a process of adding a target cell in the SCG.

The transceiver 72 is used for receiving and transmitting data under thecontrol of the processor 75.

In FIG. 7 , a bus architecture (represented by the bus 71) may includeany number of interconnected buses and bridges, specifically variouscircuits such as one or more processors represented by the processor 75and a memory represented by the storage 76 are linked together by thebus 71. The bus 71 may also link together various other circuits, suchas peripheral devices, voltage regulators, and power managementcircuits, which are well known in the art, and thus will not bedescribed further herein. The bus interface 74 provides an interfacebetween the bus 71 and the transceiver 72. The transceiver 72 may be oneor more elements, i.e., including a plurality of transmitters andreceivers, for providing elements for communicating with various otherdevices over a transmission medium. Data processed by the processor 75is transmitted over a wireless medium through the antenna 73. Further,the antenna 73 also receives data and sends the data to the processor75.

The processor 75 is responsible for managing the bus 71 and generalprocessing and may also provide various functions including timing,peripheral interfaces, voltage regulation, power management, and othercontrol functions. The storage 76 may be used to store data used by theprocessor 75 when performing operations.

Optionally, the processor 75 may be a CPU, an ASIC, a FPGA, or a CPLD.

An embodiment of the present disclosure also provides a computerreadable storage medium having a computer program stored thereon. Whenthe computer program is executed by a processor, the processorimplements each process of the method embodiments of the above method ofadding a secondary cell group applied to a terminal device, and the sametechnical effect can be achieved, and in order to avoid repetition, thedescription thereof is not repeated here. The computer readable storagemedium is, for example, a read-only memory (Read-Only Memory, ROM), arandom access memory (Random Access Memory, RAM), a magnetic disk or anoptical disc.

An embodiment of the present disclosure also provides a computerreadable storage medium having a computer program stored thereon. Whenthe computer program is executed by a processor, the processorimplements each process of the method embodiments of the above method ofadding a secondary cell group applied to a master node, and the sametechnical effect can be achieved, and in order to avoid repetition, thedescription thereof is not repeated here. The computer readable storagemedium is, for example, a read-only memory (Read-Only Memory, ROM), arandom access memory (Random Access Memory, RAM), a magnetic disk or anoptical disc.

It should be noted that such terms as “include”, “comprise”, or anyother variation thereof are intended to cover non-exclusive inclusions,such that a process, a method, an article or a device including a seriesof elements includes not only those elements, but also other elementsthat are not explicitly listed, or may also include elements inherent tosuch process, method, article, or device. An element after a phrase“including a” does not exclude presence of another identical element ina process, method, article or device including the element, if withoutfurther limitation.

Through the description of the foregoing embodiments, it is clear tothose skilled in the art that the foregoing method embodiments may beimplemented by software plus a necessary general hardware platform, andcertainly may also be implemented by hardware, but in many cases, theformer is a better implementation. Based upon such understanding, thetechnical solutions of the present disclosure essentially or a partthereof contributing to the prior art may be embodied in the form of acomputer software product which may be stored in a storage medium (e.g.,a ROM/RAM, a magnetic disk or an optical disk) and which includesseveral instructions to cause a terminal (which may be a personalcomputer, a server, an air-conditioner or a master node, etc.) toperform the methods described in the various embodiment of the presentdisclosure.

The embodiments of the present disclosure are described above withreference to the accompanying drawings, but the present disclosure isnot limited to the above-mentioned specific embodiments, and theabove-mentioned specific embodiments are only illustrative and notrestrictive. A person of ordinary skill in the art with hints of thepresent disclosure may also make many forms that fall within theprotection scope of the present disclosure without departing from thespirit of the present disclosure and the scope protected by the claimsof the present disclosure.

What is claimed is:
 1. A method of adding a secondary cell group, themethod being performed by a terminal device, the method comprising:receiving conditional-addition Secondary Cell Group (SCG) informationsent by a master node; evaluating, according to the conditional-additionSCG information, whether one or more target cells in an SCG meet acondition corresponding to triggering addition of a target cell, andobtaining a result of the evaluation; triggering, according to theresult of the evaluation, a process of adding a target cell in the SCG,wherein, triggering the process of adding the target cell in the SCGcomprises one or more of following: when the conditional-addition SCGinformation comprises the configuration information of one or moretarget cells conditionally added, performing configuration according toconfiguration information of a target cell that meets the conditioncorresponding to triggering the addition of the target cell; performingdownlink synchronization with the target cell that meets the conditioncorresponding to triggering the addition of the target cell; initiatinga random access procedure in the target cell that meets the conditioncorresponding to triggering the addition of the target cell, whereinafter triggering the process of adding the target cell in the SCG, themethod further comprises at least one of following: deleting one or moreconditions corresponding to triggering the addition of the target cell;or, deleting configuration information of one or more target cells of anunconfigured condition.
 2. The method according to claim 1, wherein theconditional-addition SCG information comprises one or more of following:identification information of one or more target cells conditionallyadded; configuration information of one or more target cellsconditionally added; one or more conditions corresponding to triggeringthe addition of a target cell; identification information of one or moreconditions corresponding to triggering the addition of the target cell.3. The method according to claim 2, wherein the condition correspondingto triggering the addition of the target cell comprises one or more offollowing: a measurement result of the target cell reaching or exceedinga preset threshold; a measurement result of a serving cell reaching orfalling below a preset threshold; difference between the measurementresult of the target cell and the measurement result of the serving cellreaching or exceeding a preset threshold; the measurement result of thetarget cell reaching or exceeding a first preset threshold, and themeasurement result of the serving cell reaching or falling below asecond preset threshold.
 4. The method according to claim 2, wherein theconditional-addition SCG information comprises one or more conditionscorresponding to triggering the addition of the target cell andeffective time of the one or more conditions; evaluating, according tothe conditional-addition SCG information, whether one or more targetcells in the SCG meet the condition corresponding to triggering theaddition of the target cell, and obtaining the result of the evaluation,comprises: for each condition corresponding to triggering the additionof the target cell, starting a timer, wherein a duration of the timer isthe effective time of each condition corresponding to triggering theaddition of the target cell; before the timer expires, evaluatingwhether a corresponding target cell meets the condition corresponding totriggering the addition of the target cell, and obtaining the result ofthe evaluation.
 5. The method according to claim 4, wherein in a case ofstarting at least one timer, the method further comprises at least oneof following: when the conditional-addition SCG information comprisesidentification information of one or more conditions corresponding totriggering the addition of the target cell, and one or more timers ofthe at least one timer expires, deleting identification information,corresponding to an expired timer, of a condition corresponding totriggering the addition of the target cell; when theconditional-addition SCG information comprises configuration informationof one or more target cells conditionally added, and one or more timersof the at least one timer expires, deleting configuration information,corresponding to an expired timer, of the target cell conditionallyadded.
 6. The method according to claim 1, wherein, theconditional-addition SCG information comprises: effective time of one ormore conditions corresponding to triggering the addition of the targetcell.
 7. The method according to claim 1, wherein after obtaining theresult of the evaluation, the method further comprises: sending anotification message to the master node, wherein the notificationmessage is used to notify the master node of related information of theSCG added by the terminal device.
 8. The method according to claim 1,wherein after triggering the process of adding the target cell, themethod further comprises: stopping evaluating whether one or more targetcells in the SCG meet the condition corresponding to triggering theaddition of the target cell.
 9. A terminal device, comprising: astorage, a processor, and a computer program stored on the storage andexecutable by the processor, wherein, when the computer program isexecuted by the processor, the processor implements steps of the methodof adding a secondary cell group according to claim
 1. 10. A method ofadding a secondary cell group, the method being performed by a masternode, the method comprising: sending conditional-addition SCGinformation to a terminal device; wherein the conditional-addition SCGinformation is used by the terminal device for evaluating, according tothe conditional-addition SCG information, whether one or more targetcells in an SCG meet a condition corresponding to triggering addition ofa target cell, and obtaining a result of the evaluation, and triggering,according to the result of the evaluation, a process of adding a targetcell in the SCG, wherein, triggering the process of adding the targetcell in the SCG comprises one or more of following: when theconditional-addition SCG information comprises the configurationinformation of one or more target cells conditionally added, performingconfiguration according to configuration information of a target cellthat meets the condition corresponding to triggering the addition of thetarget cell; performing downlink synchronization with the target cellthat meets the condition corresponding to triggering the addition of thetarget cell; initiating a random access procedure in the target cellthat meets the condition corresponding to triggering the addition of thetarget cell, wherein after triggering the process of adding the targetcell in the SCG, the terminal device performs at least one of following:deleting one or more conditions corresponding to triggering the additionof the target cell; or deleting configuration information of one or moretarget cells of an unconfigured condition.
 11. The method according toclaim 10, wherein before sending the conditional-addition SCGinformation to the terminal device, the method further comprises:sending conditional-addition SCG request information to one or moresecondary nodes; receiving conditional-addition SCG feedback informationsent by the one or more secondary nodes; wherein theconditional-addition SCG feedback information is used by the master nodeto determine corresponding conditional-addition SCG information.
 12. Themethod according to claim 11, wherein the conditional-addition SCGrequest information comprises one or more of following: identificationinformation of one or more target cells conditionally added; one or moreconditions corresponding to triggering the addition of the target cell;identification information of one or more conditions corresponding totriggering the addition of the target cell.
 13. The method according toclaim 11, wherein the conditional-addition SCG feedback informationcomprises one or more of following: information of rejecting a SCGconditionally added; information of agreeing a SCG conditionally added.14. The method according to claim 11, wherein, after receiving theconfiguration confirmation information sent by the terminal device, themethod further comprises: sending the conditional-addition SCGconfirmation information to the one or more secondary nodes.
 15. Themethod according to claim 11, wherein after receivingconditional-addition SCG feedback information sent by the one or moresecondary nodes, the method further comprises: receivingconditional-addition SCG indication information sent by a targetsecondary node; wherein the conditional-addition SCG indicationinformation is sent by the target secondary node after the targetsecondary node detects that the terminal device accesses the targetcell.
 16. The method according to claim 11, wherein after receiving theconditional-addition SCG feedback information sent by one or moresecondary nodes, the method further comprises: sending, to othersecondary nodes, related information of cancelling aconditional-addition SCG; wherein the related information of cancellingthe conditional-addition SCG is used for the other secondary nodes tocancel a resource reserved for the corresponding conditional-additionSCG, the other secondary nodes are secondary nodes other than the targetsecondary node among the one or more secondary nodes.
 17. The methodaccording to claim 11, wherein after receiving conditional-addition SCGfeedback information sent by the one or more secondary nodes, the methodfurther comprises: receiving related information, sent by othersecondary nodes, of cancelling a conditional-addition SCG; confirming,according to the related information of cancelling theconditional-addition SCG, that the corresponding conditional-additionSCG is cancelled; wherein the other secondary nodes are secondary nodesother than the target secondary node among the one or more secondarynodes.
 18. A master node, comprising: a storage, a processor, and acomputer program stored on the storage and executable by the processor,wherein, when the computer program is executed by the processor, theprocessor implements steps of the method of adding a secondary cellgroup according to claim 10.